Custom / Semi-Custom O-Rings

O-Ring Materials

Most materials are available in durometers (hardness) from 45 to 95 Shore A. The suitable medias listed below are only basic examples and are by no means an exhaustive list. Please let us know the media in which your o-rings will be exposed to so that we can confirm the appropriate material that is most suitable and economical for your use.

O-Ring Sizing

We stock over 25,000 mold sizes. AS568A is the American standard for o-ring sizing. If you need a size outside of the AS568A spectrum, we most likely have a mold for it already. If we don't, we are happy to produce the mold for you with absolutely no tooling charge for virtually any size. This allows for a huge savings when producing odd size parts. We can produce any size o-ring as well as any shaped parts such as V-Rings, X-Rings, etc.

O-Ring Material Colors

Captain O-Ring LLC specializes in colored o-rings. We are capable of producing most materials in virtually any color. We do have a list of stock colors for which we keep most compounds in stock in these colors. This creates shorter lead time and slightly lower costs and minimums for these colors.

If you would prefer a color that you do not see on the chart above, we can produce virtually any Pantone color for you.

O-Ring Minimum Order Quantities

Because of the nature of custom parts, it is impossible for us to provide example MOQs. Larger o-ring sizes typically call for smaller minimums. Completely custom colors usually come along with slightly higher minimums for smaller o-ring sizes due to the amount of compound that must be produced to reach an accurate, uniform color. Please inquire with us to get an exact MOQ for your parts based on size, color, and material choice.

O-Ring Order Lead Time

The lead time for most runs of stock-custom color o-rings, as well as black and natural rubber colors is 24-26 calendar days. For sizes that we do not have a mold in stock, the lead time is typically about 30-36 days to include the time needed to create the new mold. Most completely custom color o-rings can be produced in the same time frame as stock-custom colors.